In order to improve the safety and the dynamic stability of the hoistable mast, the method of parametric optimization was introduced and the dynamic model was established by the multi-rigid-body dynamic analysis soft of Adams in the beginning of the product design. Then, the dynamic simulation and the structure optimization were carried out. It was shown that the maximum force on the primary oil cylinder was reduced by 10%, the maximum force on the secondary oil cylinder was reduced by 8%, the structure layout of the mast was more reasonable and the dynamic stability were improved. Also, it was proved that the optimized structure of the hoistable mast was reasonable and feasible by simulation results.